Webcam without joining

Joining a Microsoft Teams meeting today (first time as I recall) I was surprised to find it automatically enabled my webcam. I also don't see anywhere in the settings to make this a default for the next meeting.

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Leitschuh reported the vulnerability to Zoom in March.

The company responded by releasing a fix for an unrelated flaw that would allow a hacker to trigger an endless loop of meeting requests. In a blog post updated Tuesday afternoon, Zoom said it will release a patch for the vulnerability by July 11.

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Once the embed loads on the website, the Zoom app will launch and, depending on the settings of the user, give an attacker and any other participants in that meeting immediate access to the victim’s camera and microphone — without requiring a single click from the victim.“Per their own statement, Zoom made a set of product decisions that intentionally prioritized use of their system over user choice,” security consultant Eleanor Saitta told Buzz Feed News.“Zoom clearly had not considered malicious uses — or, worse, had disregarded them — when they decided to remove this choice from the user, and appear to consider Zoom use, and presumably their revenue growth, more important than surveillance of users,” Saitta added.

The iframe embed doesn’t require a user click because of a second application, referred to as a localhost web server, that is automatically installed alongside the Zoom Mac desktop app and runs constantly in the background.

Users can also, Leitschuh discovered, visit a website with what’s called an iframe embed hiding behind a malicious advertisement.

When you first download the Zoom app, it asks if you want to leave your camera turned off for future meetings.

The camera is turned on by default, and you need to specifically check the preference to turn the camera off.

Because it’s video conferencing software, most people don’t check the checkbox.

In fact, Zoom’s Farley said, “For the best user experience, we recommend that users do [have their camera turned on automatically when joining a meeting].” Additionally, meeting hosts can prefer that participants videos are on when they create meetings.

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